摘要
钛合金具有密度低、比强度高,耐蚀性好,加工性能优异等优点,主要应用于航空航天、交通运输和石油化工等领域。当钛合金作为结构材料应用在不同领域时,传统的熔融焊接方法会产生较大残余应力,组织粗化,变形大,裂纹和孔隙等缺陷;而采用搅拌摩擦焊接技术可以避免传统熔融焊接方法产生的缺陷,从而大幅度提高钛合金焊接接头质量。目前,钛合金的搅拌摩擦焊接技术已成为国内外研究热点。主要介绍搅拌摩擦焊接的原理、工艺特点,国内外关于钛合金FSW焊接接头的宏观形貌、微观组织(晶粒大小、织构)和力学性能等方面的最新研究进展,最后展望了钛合金FSW未来的研究方向。
Titanium alloys with some advantages of low density,high specific strength,good corrosion resistance and excellent processing performance are mainly used in the aerospace,transportation,petrochemical and other fields. When using titanium alloys as structural materials in different fields,the traditional fusion welding method will produce a larger residual stress,microstructure coarsening,large deformation,cracks,pores and other defects,while the friction stir welding （FSW） technology can avoid these defects,thus sharply improves the quality of the welded joints of titanium alloys. In addition,the FSW technology of the titanium alloy has become a research focus. In this paper,the theol3~ and technology characteristics of FSW are introduced,and the latest research progress of the welded joints in FSW for titanium alloys at home and abroad is also introduced from the aspects of the macrostmcture,microstructure （grain size,texture） and mechanical properties. And the further trends of FSW of titanium alloys are discussed.
出处
《电焊机》
2017年第5期67-72,共6页
Electric Welding Machine
基金
国家自然科学基金(U1360105)
国家自然科学基金(51574192)
关键词
钛合金
搅拌摩擦焊
微观组织
力学性能
titanium alloys
friction stir welding
microstructure
mecbanieal properties
